Just go over to her, tell her she caught your eye and ask if she likes to have some lunch with you today or any other day. If she confirms that she would like t

Just go over to her, tell her she caught your eye and ask if she likes to have some lunch with you today or any other day. If she confirms that she would like to, great! spend some time with her and see how it goes. If she is overwhelmed by you approaching her or tells you she would rather not, tell her that it's fine and that in case she changes her mind she should feel free to contact you (she knows where you work). Then just to back to your work and get her out of your mind. edit: fixed typo